Belgian media are reporting that explosion-like noises have been heard at a Brussels train station, prompting the evacuation of a main square.

Broadcaster RTL quoted Fires Services spokesman Pierre Meys confirming that some kind of an explosion had happened in the city’s Central station on Tuesday. Meys could not say what had caused the blast.

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The Belgian capital’s Grand Place, a major tourist site, was evacuated along with the station about 200 meters (656 feet) away.

According to Reuters, police have “neutralized” someone wearing an explosive belt: